<s>
TOSLINK	B-Protocol
(	O
from	O
Toshiba	B-Protocol
Link	I-Protocol
)	O
is	O
a	O
standardized	O
optical	B-Device
fiber	I-Device
connector	I-Device
system	O
.	O
</s>
<s>
Also	O
known	O
generically	O
as	O
optical	B-Protocol
audio	I-Protocol
,	O
its	O
most	O
common	O
use	O
is	O
in	O
consumer	O
audio	O
equipment	O
(	O
via	O
a	O
"	O
digital	B-Protocol
optical	I-Protocol
"	O
socket	O
)	O
,	O
where	O
it	O
carries	O
a	O
digital	O
audio	O
stream	O
from	O
components	O
such	O
as	O
CD	O
and	O
DVD	O
players	O
,	O
Digital	O
Audio	O
Tape	O
recorders	O
,	O
computers	O
,	O
and	O
modern	O
video	B-Device
game	I-Device
consoles	I-Device
,	O
to	O
an	O
AV	O
receiver	O
that	O
can	O
decode	O
two	O
channels	O
of	O
uncompressed	O
pulse-code	B-Algorithm
modulated	I-Algorithm
(	O
PCM	B-Algorithm
)	O
audio	O
or	O
surround	O
sound	O
such	O
as	O
Dolby	O
Digital	O
or	O
DTS	O
Surround	O
System	O
.	O
</s>
<s>
Unlike	O
HDMI	B-Protocol
,	O
TOSLINK	B-Protocol
does	O
not	O
have	O
the	O
bandwidth	O
to	O
carry	O
the	O
uncompressed	O
versions	O
of	O
Dolby	O
TrueHD	O
,	O
DTS-HD	O
Master	O
Audio	O
,	O
or	O
more	O
than	O
two	O
channels	O
of	O
PCM	B-Algorithm
audio	I-Algorithm
.	O
</s>
<s>
Although	O
TOSLINK	B-Protocol
supports	O
several	O
different	O
media	O
formats	O
and	O
physical	O
standards	O
,	O
digital	O
audio	O
connections	O
using	O
the	O
rectangular	O
EIAJ/JEITA	O
RC-5720	O
(	O
also	O
CP-1201	O
and	O
JIS	O
C5974-1993	O
F05	O
)	O
connector	O
are	O
by	O
far	O
the	O
most	O
common	O
.	O
</s>
<s>
The	O
optical	O
signal	O
is	O
a	O
red	O
light	O
with	O
a	O
peak	O
wavelength	O
of	O
Depending	O
on	O
the	O
type	B-Application
of	I-Application
modulated	I-Application
signal	I-Application
being	O
carried	O
,	O
other	O
optical	O
wavelengths	O
may	O
be	O
present	O
.	O
</s>
<s>
Toshiba	O
originally	O
created	O
TOSLINK	B-Protocol
to	O
connect	O
their	O
CD	O
players	O
to	O
the	O
receivers	O
they	O
manufactured	O
,	O
for	O
PCM	B-Algorithm
audio	I-Algorithm
streams	O
.	O
</s>
<s>
The	O
software	O
layer	O
is	O
based	O
on	O
the	O
"	O
Sony/Philips	O
Digital	O
Interface	O
"	O
(	O
S/PDIF	O
)	O
,	O
while	O
the	O
hardware	O
layer	O
utilizes	O
a	O
fiber	B-Architecture
optic	I-Architecture
transmission	O
system	O
,	O
rather	O
than	O
the	O
electrical	O
(	O
copper	O
)	O
hardware	O
layer	O
of	O
S/PDIF	O
.	O
</s>
<s>
TOSLINK	B-Protocol
was	O
soon	O
adopted	O
by	O
manufacturers	O
of	O
most	O
CD	O
players	O
.	O
</s>
<s>
Variations	O
of	O
the	O
name	O
,	O
such	O
as	O
TOSlink	B-Protocol
,	O
TosLink	B-Protocol
,	O
and	O
Tos-link	O
,	O
are	O
also	O
seen	O
,	O
while	O
the	O
official	O
generic	O
name	O
for	O
the	O
standard	O
is	O
EIAJ	B-Protocol
optical	I-Protocol
.	O
</s>
<s>
ADAT	O
Lightpipe	O
or	O
simply	O
ADAT	O
Optical	O
uses	O
an	O
optical	O
transmission	O
system	O
similar	O
to	O
TOSLINK	B-Protocol
,	O
and	O
is	O
used	O
in	O
the	O
professional	O
music/audio	O
industry	O
.	O
</s>
<s>
While	O
the	O
ADAT	O
Lightpipe	O
format	O
uses	O
the	O
same	O
JIS	O
F05	B-Protocol
connectors	I-Protocol
as	O
TOSLINK	B-Protocol
,	O
the	O
ADAT	O
Lightpipe	O
data	O
format	O
is	O
not	O
compatible	O
with	O
S/PDIF	O
.	O
</s>
<s>
Although	O
less	O
commonly	O
available	O
and	O
more	O
expensive	O
than	O
plastic	O
optical	B-Architecture
fiber	I-Architecture
(	O
POF	O
)	O
cables	O
,	O
glass	O
or	O
silica	O
optical	B-Architecture
fibers	I-Architecture
have	O
lower	O
losses	O
and	O
can	O
extend	O
the	O
range	O
of	O
the	O
TOSLINK	B-Protocol
system	O
.	O
</s>
<s>
Several	O
types	O
of	O
fiber	O
can	O
be	O
used	O
for	O
TOSLINK	B-Protocol
:	O
inexpensive	O
plastic	O
optical	B-Architecture
fiber	I-Architecture
,	O
higher-quality	O
multistrand	O
plastic	O
optical	B-Architecture
fibers	I-Architecture
,	O
or	O
quartz	O
glass	O
optical	B-Architecture
fibers	I-Architecture
,	O
depending	O
on	O
the	O
desired	O
bandwidth	O
and	O
application	O
.	O
</s>
<s>
TOSLINK	B-Protocol
cables	O
are	O
usually	O
limited	O
to	O
in	O
length	O
,	O
with	O
a	O
technical	O
maximum	O
of	O
,	O
for	O
reliable	O
transmission	O
without	O
the	O
use	O
of	O
a	O
signal	O
booster	O
or	O
a	O
repeater	O
.	O
</s>
<s>
However	O
,	O
it	O
is	O
very	O
common	O
for	O
interfaces	O
on	O
newer	O
consumer	O
electronics	O
(	O
satellite	O
receivers	O
and	O
PCs	O
with	O
optical	O
outputs	O
)	O
to	O
easily	O
run	O
over	O
on	O
even	O
low-cost	O
TOSLINK	B-Protocol
cables	O
.	O
</s>
<s>
TOSLINK	B-Protocol
transmitters	O
operate	O
at	O
a	O
nominal	O
optical	O
wavelength	O
of	O
.	O
</s>
<s>
Mini-TOSLINK	B-Protocol
is	O
a	O
standardized	O
optical	B-Device
fiber	I-Device
connector	I-Device
smaller	O
than	O
the	O
standard	O
square	O
TOSLINK	B-Protocol
connector	O
commonly	O
used	O
in	O
larger	O
consumer	O
audio	O
equipment	O
.	O
</s>
<s>
The	O
plug	O
is	O
almost	O
the	O
same	O
size	O
and	O
shape	O
as	O
the	O
ubiquitous	O
stereo	O
minijack	B-Device
.	O
</s>
<s>
Adapters	O
are	O
available	O
to	O
connect	O
a	O
full-size	O
TOSLINK	B-Protocol
plug	O
to	O
a	O
mini-TOSLINK	B-Protocol
socket	O
.	O
</s>
<s>
Combined	O
jack	O
and	O
mini-TOSLINK	B-Protocol
sockets	O
exist	O
which	O
can	O
accept	O
a	O
jack	O
or	O
a	O
mini-TOSLINK	B-Protocol
plug	O
;	O
mini-TOSLINK	B-Protocol
plugs	O
are	O
made	O
longer	O
than	O
electrical	O
jack	B-Device
plugs	I-Device
so	O
that	O
the	O
latter	O
are	O
too	O
short	O
to	O
touch	O
and	O
damage	O
the	O
LED	O
of	O
combined	O
connectors	O
.	O
</s>
<s>
Many	O
discontinued	O
laptop	B-Device
computer	I-Device
and	O
portable	O
digital	O
audio	O
equipment	O
models	O
,	O
such	O
as	O
the	O
Google	B-Device
Chromecast	I-Device
Audio	I-Device
device	O
,	O
Apple	O
AirPort	O
Express	O
,	O
and	O
iPod	B-Device
Hi-Fi	I-Device
use	O
these	O
connectors	O
that	O
allow	O
for	O
the	O
insertion	O
of	O
analog	O
(	O
electrical	O
)	O
headphone	O
output	O
,	O
microphone	O
input	O
,	O
or	O
mini-TOSLINK	B-Protocol
digital	O
(	O
optical	O
)	O
output	O
.	O
</s>
